inspect — Debug Parsed Function Info

inspect runs the analyzer on a function and prints the resulting FuncInfo as JSON. It does not generate any test code.

Syntax

go-testgen inspect <pkg-pattern> <FuncSpec>

Example

go-testgen inspect ./internal/core/services/user Service.CreateUser

Output (abbreviated):

{
  "Name": "CreateUser",
  "Package": "user",
  "ImportPath": "github.com/acme/app/internal/core/services/user",
  "IsMethod": true,
  "Receiver": {
    "TypeName": "Service",
    "IsPointer": true,
    "Fields": [...]
  },
  "Params": [
    {
      "Name": "ctx",
      "TypeName": "context.Context",
      "IsContext": true
    },
    {
      "Name": "req",
      "TypeName": "*userDomain.UserCreateRequest",
      "IsInterface": false,
      "IsPointer": true
    }
  ],
  "Results": [
    {
      "TypeName": "*userDomain.User",
      "IsPointer": true
    },
    {
      "TypeName": "error",
      "IsError": true
    }
  ],
  "HasError": true,
  "HasContext": true
}

When to Use

• The generated test has a wrong signature — check if the analyzer resolved the type correctly.
• A parameter is not recognized as an interface — confirm IsInterface is true.
• A mock is not being suggested — verify the Receiver.Fields list includes the expected interface field.
• You want to understand what gen sees before it produces output.